package com.guigu.springcloud.controller;


import com.guigu.springcloud.common.CommonResult;
import com.guigu.springcloud.entity.Payment;
import com.guigu.springcloud.lb.LoadBalance;
import lombok.extern.slf4j.Slf4j;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

import javax.annotation.Resource;
import java.util.List;

@RestController
@Slf4j
@RequestMapping("/consumer")
public class OrderController {
    //        public static final String PAYMENT_URL = "http://localhost:8001";
    // Eureka通过服务名访问
    public static final String PAYMENT_URL = "http://CLOUD-PROVIDER-PAYMENT";

    @Resource
    private RestTemplate restTemplate;
    @Resource
    private DiscoveryClient discoveryClient;


    @GetMapping
    public CommonResult insert(Payment payment) {
        return restTemplate.postForObject(PAYMENT_URL + "/payment", payment, CommonResult.class);
    }

    @GetMapping("/{id}")
    public CommonResult getPayment(@PathVariable("id") Long id) {
        return restTemplate.getForObject(PAYMENT_URL + "/payment/" + id, CommonResult.class);
    }


    @GetMapping("/getEntity")
    public CommonResult insertByGetEntity(Payment payment) {
        ResponseEntity<CommonResult> getEntity = restTemplate.postForEntity(PAYMENT_URL + "/payment", payment, CommonResult.class);
        if (getEntity.getStatusCode().is2xxSuccessful()) {
            return getEntity.getBody();
        } else {
            return CommonResult.voData(404, "查询失败", null);
        }
    }

    @GetMapping("/getEntity/{id}")
    public CommonResult getPaymentByGetEntity(@PathVariable("id") Long id) {
        ResponseEntity<CommonResult> getEntity = restTemplate.getForEntity(PAYMENT_URL + "/payment/" + id, CommonResult.class);
        if (getEntity.getStatusCode().is2xxSuccessful()) {
            return getEntity.getBody();
        } else {
            return CommonResult.voData(404, "查询失败", null);
        }
    }


    //手动实现轮询负载均衡
    @Resource
    private LoadBalance loadBalance;

    @GetMapping("/myloadBalance")
    public String getBalanceService() {
        List<ServiceInstance> instances = discoveryClient.getInstances("CLOUD-PROVIDER-PAYMENT");
        ServiceInstance serviceInstance = loadBalance.instances(instances);
        return restTemplate.getForObject(serviceInstance.getUri() + "/payment/myloadBalance", String.class);
    }
}
